Finding the Third Proportional to 161,991.50 and 228,019.50

Step by Step Solution

1. Step 1: Write the proportion equation
   161,991.50 : 228,019.50 = 228,019.50 : x
2. Step 2: Convert to fraction form
   161,991.50/228,019.50 = 228,019.50/x
3. Step 3: Cross multiply
   161,991.50x = 228,019.50 × 228,019.50
4. Step 4: Simplify right side
   161,991.50x = 51,992,892,380.25
5. Step 5: Solve for x
   x = 51,992,892,380.25/161,991.50
6. Step 6: Final answer
   x = 320,960.62